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在东北地区中部开展春玉米分期播种试验，研究温度变化对玉米生长的影响；利用分期播种资料，根据积温学说和玉米生长与气象条件的关系，建立了春玉米主要生长发育期评估和预报模式。经过资料验证，证明评估和预报方法效果较好，可以用于当地玉米发育期预报或评估。“,”The spring maize experiment of sowing by stages was carried out in the central part of northeast area to study the effect of temperature effects on the growth of corn. Using the sowing data, according to the accumulated temperature theory and the relationship of the maize growth and meteorological conditions, assessment and prediction model in spring corn growth period was established. After verification, it was proved that effect of evaluation and forecast method was good and could be used for forecast and evaluation of local corn development stage.